Corkscrew



FIG. 1 is an upper perspective view of the corkscrew showing my design;

FIG. 2 is another upper perspective view thereof, rotated 90 degrees from the view of FIG. 1;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a side elevation view, an opposite side elevation view being a mirror image thereof; and,

FIG. 6 is a back elevation view thereof.

The bottom plan view of the corkscrew is not part of the claimed design. 

CLAIM The ornamental design for a corkscrew, as shown and described. 